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稀土镧掺杂二氧化钛的光催化特性
引用本文:水淼,岳林海,徐铸德.稀土镧掺杂二氧化钛的光催化特性[J].物理化学学报,2000,16(5):459-463.
作者姓名:水淼  岳林海  徐铸德
作者单位:Department of Chemistry,Zhejiang University,Hangzhou 310027
摘    要:二氧化钛有合适的禁带宽度,在光催化体系中有较好的稳定性,是一种较为理想的半导体光催化剂.近来,在太阳能转换和储存,二氧化碳还原,有害复杂有机物降解等方面都引起了广泛的研究兴趣.已有文献报导了不同的掺杂催化体系对其光催化性能的影响.Kakuta1,2]等研究了二氧化钛复合氧化物体系的光催化性能.Choi3]等系统地研究了过渡金属氧化物掺杂的二氧化钛的光催化性能和空穴电子复合之间的联系.也有研究者从掺杂体系的晶体结构和表面物化性质,如晶相(锐钛矿,金红石,无定形),比表面积,晶粒尺寸和表面羟基的角度讨论与光催化活性的关…

关 键 词:镧掺杂  光催化  二氧化钛  晶格膨胀  
收稿时间:1999-06-14
修稿时间:1999-10-20

Effect of Lanthanum Doping on the Photocatalytic Activity of Titanium Dioxide
Shui Miao,Yue Linhai,Xu Zhude.Effect of Lanthanum Doping on the Photocatalytic Activity of Titanium Dioxide[J].Acta Physico-Chimica Sinica,2000,16(5):459-463.
Authors:Shui Miao  Yue Linhai  Xu Zhude
Institution:Department of Chemistry,Zhejiang University,Hangzhou 310027
Abstract:The effect of Lanthanum content,calcinating temperature and calcinating time on the photocatalytic activity of Lanthanum doping TiO 2 was investigated.The study showed that samples treated under higher temperature and longer calcinating time exhibited higher photocatalytic activity.The X ray diffraction pattern revealed that the lattice of those samples was highly expanded.It is suggested that the highly distorted crystal lattice may be involved in producing more ways by which the hole was captured.Thus,the photocatalytic activity of samples treated under higher temperature and longer time was promoted.
Keywords:Lanthanum doping    Photocatalytic activity    Titanium dioxide  Lattice expansion
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